Identify three strategies to reduce indoor heat gain for hotels in tropical climates.

• A. Use Reflective Paints on Roofs Only, No Shading, Minimal Ventilation
• B. Implement Extensive External Shading and Overhangs, Use High-Performance Glazing with Solar Control, and Design for Natural Ventilation Supplemented by Efficient Cooling Where Needed
• C. Rely Solely on Air Conditioning Without Ventilation
• D. Install Dark Reflective Glass Without Shading

Answer: (B)

To cut indoor heat gain in tropical hotels, the best approach combines blocking sun before it enters, controlling what sunlight can enter, and letting the building breathe naturally while using cooling only where needed. Extending external shading and overhangs keeps direct solar rays from hitting windows and walls, which drastically reduces the heat that would otherwise build up inside. Pair that with high-performance glazing that has solar-control properties to let daylight in while minimizing the amount of heat that penetrates. Designing for natural ventilation—so spaces can be cooled by exchanging indoor and outdoor air—lowers reliance on mechanical cooling, and any cooling equipment used should be efficient and only as large as necessary. Together, these strategies address heat at its source, keep interiors comfortable with less energy, and make the cooling system more effective when it’s required.

Relying only on reflective roof treatments with no shading or ventilation, or depending solely on air conditioning, fails to reduce heat gain where it matters most—through windows and walls. Installing dark reflective glass without shading would also increase heat entry, making cooling harder.